I had know ideal what is was till i looked infomation up on it.
Diwali, also called Deepavali (Hindi: ?????? or ???????, Marathi: Tamil: Kannada: ???????) is a major Hindufestival. Known as the "Festival of Lights," it symbolises the victory of good over evil, and lamps are lit as a sign of celebration and hope for mankind. The festival of Diwali or Deepawali (literal meaning: lines of lamps) is rooted in the mythological epic Ramayana, and is a celebration of the return of Lord Ram after killing Ravan the Demon during his exile for 14 years. The day of killing Ravan is celebrated as Dussehra (19 to 21 days before Diwali). Celebrations focus on lights and lamps, particularly traditional diyas (as illustrated). Fireworks are associated with the festival in many regions of India.
Diwali is celebrated for five consecutive days in the Hindu month of Ashwayuja. It usually occurs in October/November, and is one of the most popular and eagerly awaited festivals of India. Hindus, Jains and Sikhs alike regard it as a celebration of life and use the occasion to strengthen family and social relationships. For Jains it is one of the most important festivals, and beginning of the Jain year. Jains celebrate Diwali because Lord Mahaveera has gone to Moksha. It is also a significant festival for the Sikh faith.